| Penulis/Author |
Ir. Ali Awaludin, S.T., M.Eng., Ph.D., IPU., ACPE. (1) ; Muhammad Afif Sulhan (2); Mahmud Kori Effendi (3); Dr. Ir. Inggar Septhia Irawati, S.T., M.T., IPM. (4); Rohana Hassan (5) |
| Abstrak/Abstract |
The study was conducted as part of an effort to establish the glulam standard made from Indonesian wood species. At first, bending strength and stress-strain curve in both tension and compression parallel-to-grain tests of clear specimens were carried-out for nine potential wood species; jabon; pine; mahogany; akasia; rubber wood; merbau; keruing; meranti batu; and bangkirai. Followed up by testing the glulam beams of jabon and keruing species, prepared by two local glulam producers, for two different sizes (Beam A: cross-section of 140 mm by 200 mm, length of 3700 mm; Beam B: cross-section of 140 mm by 250 mm, length of 4600 mm). Polyurethane and phenol resorcinol formaldehyde adhesives were used in the glulam production of jabon and keruing beams, respectively. The beams were tested until failure under the four-point loading configuration described in EN 408:2007 to examine its flexural properties, Modulus of Rupture, Modulus of Elasticity, and mode of failure. The results of clear specimen test showed that the bending strength, tensile strength, and compressive parallel-to-grain strength increases as wood density increases. A linier stress-strain model in tension zone and a bi-linier stress-strain relationship in compression zone is necessary to properly simulate the structural properties of glulam beams. Based on its modulus of rupture the tested glulam beams of jabon can be classified as GL28h or GL30h, while the glulam beams of keruing can be categorized into GL54h. Based on visual examination of beams failure after the bending tests are completed, some recommendations for glulam production improvement were proposed. |
